netneut
finishing.com -- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing


Finishing.com has been free for 22 years,
but without net neutrality we could soon
cease to exist. Do us a solid, click on
the banner, and contact congress today!
HomeFAQsBooksHelpWantedAdvertiseForum
topic 6705

Ferricyanide Removal / Destruction for disposal


(2000)

Due to the regulations on the ferricyanide in the Alodine 1200s the company I work for has switched over to Alodine 600. However, this means that I must dispose of the 1200s and it's dragout, before doing this I must neutralize the ferricyanide within the 1200s. I am planning on neutralizing the ferricyanide with 1.5 lb of Zinc Sulfate per 0.1% of potassium ferricyanide. Does anyone know a titration to find out the % of ferricyanide within the 1200s? Or is there a better method for removing the ferricyanide?

Benjamin Curto
- Ponderay, Idaho, USA


(2000)

That sounds like it should work fine. I'd suggest the following:

1) Reduce the ferricyanide to ferrocyanide with sodium metabisulfite first.

2) The lowest levels obtainable with this technique result when the iron cyanides are precipitated at pH 6 - 7, then the residual zinc and other metals removed in a second step.

3) If manganese is not regulated in your area, it may be substituted for the zinc and simplify the treatment process.

Good Luck,

dave wichern
Dave Wichern
Consultant - The Bronx, New York



This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to Search the Site

ADD a Q or A to THIS thread START a NEW THREADView This Week's HOT TOPICS

Disclaimer: It's not possible to diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices


©1995-2017 finishing.com     -    Privacy Policy
How Google uses data when you visit this site.